P037C — Cold Start Camshaft Profile System Performance
On engines with multi-profile (cold-start) cam lobes (e.g. some Honda i-VTEC variants and BMW Valvetronic), the cold-start cam profile actuator is not switching as expected — typically a stuck oil control valve or worn locking pin.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Camshaft
- Oil control valve
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Profile actuator stuck
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.